Improvement in stove-pipe fitters



G. SGOTT.

Stove-Pipe Fitter NO. 134,170. Patented Dec.24,1872.

F/ (2.5. F/ C.4.

PAIEN GEORGE seorr, on MONTRAL, CANADA.

IMPROVEMENT IN STOVE-PIPE FITTERS.

Specification forming part of Letters Patent No. 134 170, dated December .2, 1872.

T0 all u*hom it may concem:

Be it known that I, GEORGE SCOTT, of the city of Montreal, in the District of Montreal, in the Province of Quebec, Canada, have invented new and nseful Improvements on Machines or Appliances used for Fitting Stove- Pipes together; and Ido hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, where Figure 1 represents a front elevation of my 7 invention. Fig. 2 represents a side elevation mon 130 find a great variation from the nomina1 size, and that in many of the lengths the end that is supposed to fit within that of the other is very far from doing se. The ordinary plan of overcoming this difficnlty is to ont a slit up one pipe and contract the ont end, then fdrceit into the other. This forms not only a very imperfect, but also an nnsightly joint. Another plan is to put a large corrugation in the end to reduee its diameter. This is equally objectionabie, as, 'althongh the pipes may be got together, the joint thus made is far from a,closely-fitting one.

In the drawing similar letters of reference indicate like parts.

Letter a is a frame made in two parts for holding the moving portions of the machine together; this is provided with a projection,

taper the amount of interlock of the teeth or corrngations decreases to admit of an entire separation at the smaller end capable of allowing the thiekness of sheet metal to be acted pon to be introduced between them. e is a shaft held in the required position by the frame a, eyesfor this purpose being formed in it where the top and bottom corne together, the latter being the cap of the bearings. On the shaft 6, and made in one With it, are two threads, f and 9, sitnated as shown in the drawing, and arrangd to intermesh with the teeth or corrugations of the rollers d; the pitch of the thread f is left-handed, while that of 9 is right-handed, and they must be made sufficiently coarse to agree With the teeth of the gears d, care being taken to have them in the proper position on the shaft 6, so that each thread engages with the teeth .of eaeh wheel when the wheels are properly The shaft 6 is actnated by any suitin gear. ab1e crank-handle, 7L, attached, or made in one With it. This gives a large amonnt et leverage, whieh is reqnired in workingthe sheet metal to be operated upon, the crank h beig rotated one revolution for each tooth in either of the wheels.

The operation of fitting the pipes together is as follows: Having determined on the end of the pipe to be put With the other, I place its.edge between the sma1ler ends of the rollers 61, as indicated by the large dotted cirele in Fig. 1, and, by pressure applied With the hand and the top of the frame a, I force the rollers on it at the seam the reqnired amonnt, or nntil its edge comes in contact With the frame at the point z, shown in Fig. 2, and, by

means of the crank h, rotate the shaft e, causing the corrugated rollers to travel in the direction from the seam until they corne np to it again on the other side. This operation corrngates the pipe at its edge compietely aronnd its circnmference, with the exception of the seam. The eorrugations thus formed at the edge extend backward, but, in doing' it WII be seen that, by the use of my appacrank h, substanbally as and for the purposes set forth.

Montreal, 22d day of Angusc, A. D. 1872.

GEORGE SOOTT. Witnesses CHARLES G. C. SIMPSON, FRAS. HY. REYNOLDS. 

